Two former Parramatta Eels players are accused of harbouring semi-automatic weapons and possessing more than half-a-million dollars in cash after dramatic arrests in Sydney's Centennial Park yesterday.

File closed three times on troubled girl

South Australian child welfare authorities closed the file three times on a clearly troubled young girl in the years leading up to her death, an inquest has heard.

The 14-year-old was found electrocuted near train tracks in Adelaide's south in 2014 after a long history of self-harm, violent and aggressive behaviour and absconding, counsel assisting Ahura Kalali told the inquest on Tuesday.

Mr Kalali said the girl had spent much of her life in informal foster care before being placed under a guardianship order and was repeatedly considered to be of low risk.

He said Families SA closed its file on the teenager three times despite documented interactions between the department, her carers and various medical professionals.

In 2013, officials determined the girl "did not meet the threshold" for a screening assessment, the court heard.